Combined SQL select 数据集多行根据列值合并成一行

Question

我有一个 SQL 查询，它将来自多个数据库表的数据组合成一个数据集，例如：

SELECT 
    CS.Id As ID,
    CP.Country As Country,
    S.Title As Site,
    CONCAT(V.Title,' ',M.Model,' ',M.Version) As Machine,
    CP.Title As Protocol,
    CS.Title As Sequence,
    IQS.SequenceType AS Type,
    IQS.ImageQuality AS IQ,
    _IQBeforeOpt =
        CASE IQS.SequenceType
            WHEN 1 THEN IQS.ImageQuality
        END,
    _IQDuringOpt = 
        CASE IQS.SequenceType
            WHEN 2 THEN IQS.ImageQuality
        END,
    _IQAfterOpt = 
        CASE IQS.SequenceType
            WHEN 3 THEN IQS.ImageQuality
        END,
   ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY))) AS SeqPI,
   _SeqPIBeforeOpt = 
        CASE IQS.SequenceType
            WHEN 1 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
       END,
  _SeqPIDuringOpt =
      CASE IQS.SequenceType
          WHEN 2 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
      END,
  _SeqPIAfterOpt =
      CASE IQS.SequenceType
          WHEN 3 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
      END       
FROM ClientSequence CS
JOIN ImageQualitySequencePool IQS ON CS.Id = IQS.SequenceId
JOIN ClientProtocol CP ON CS.ClientProtocolId = CP.Id
JOIN Team S ON CP.TeamID = S.Id
JOIN Machine M On CP.MachineId = M.Id
JOIN Vendor V ON M.VendorId = V.Id
ORDER BY CP.Country,S.Title,CP.MachineId,CP.Title,CS.Title,IQS.SequenceType

上面的查询用于组合来自多个表（主表是 ClientSequence 和 ImageQualitySequencePool）的数据来构建我想用于报告的数据集。

这里有一些指示值：

ID  Country    Site    Machine   Protocol   Sequence          Type  IQ   _IQBeforeOpt   _IQDuringOpt   _IQAfterOpt  SeqPI   _SeqPIBeforeOpt   _SeqPIDuringOpt    _SeqPIAfterOpt
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
41  Country_1  Site_1  Mach_1    ProtocolA  Ax_PD_FSE_FS      1     2    2              NULL            NULL         0.805   0.805             NULL               NULL
86  Country_1  Site_1  Mach_1    ProtocolA  Ax_PD_FSE_FS      2     4    NULL           4               NULL         1.38    NULL              1.38               NULL
91  Country_1  Site_1  Mach_1    ProtocolA  Ax_PD_FSE_FS      3     3    NULL           NULL            3            1.03    NULL              NULL               1.03

76  Country_1  Site_1  Mach_1    ProtocolB  Cor_PD_FSE_FS     1     3    3              NULL            NULL         0.83    0.83              NULL               NULL
88  Country_1  Site_1  Mach_1    ProtocolB  Cor_PD_FSE_FS     2     4    NULL           4               NULL         1.62    NULL              1.62               NULL
92  Country_1  Site_1  Mach_1    ProtocolB  Cor_PD_FSE_FS     3     3    NULL           NULL            3            1.21    NULL              NULL               1.21

91  Country_2  Site_3  Mach_3    ProtocolA  Seg_SF_FSE_FS     1     3    1              NULL            NULL         1.41    1.41              NULL               NULL
94  Country_2  Site_3  Mach_3    ProtocolA  Seg_SF_FSE_FS     2     2    NULL           2               NULL         1.28    NULL              1.28               NULL

72  Country_2  Site_3  Mach_3    ProtocolC  Ger_SE_FSE_FS     1     3    3              NULL            NULL         0.83    0.83              NULL               NULL

所以 "Country, Site, Machine, Protocol, Sequence" 的每个组合都可以是类型：1,2 或 3 意思是：

类型 1：优化前的序列
类型 2：序列在优化
类型 3：优化后的序列

正如您最初在查询中看到的那样，我在数据库中存储了一些 IQ 和 SeqPI 的值，并且我根据序列的类型。

一些 "Sequences" 有对应所有 3 种类型的记录，而另一些则没有。

我想要的是将 "Country, Site, Machine, Protocol, Sequence" 的特定组合的所有记录合并到一行中。所以最后我想要一个查询，它产生的数据集如下：

Country    Site    Machine   Protocol    Sequence       Type     _IQBeforeOpt   _IQDuringOpt   _IQAfterOpt  _SeqPIBeforeOpt   _SeqPIDuringOpt    _SeqPIAfterOpt
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Country_1  Site_1  Mach_1    ProtocolA   Ax_PD_FSE_FS   1,2,3    2              4             3            0.805              1.38               1.03
Country_1  Site_1  Mach_1    ProtocolB   Cor_PD_FSE_FS  1,2,3    3              4             3            0.83               1.62               1.21
Country_2  Site_3  Mach_3    ProtocolA   Seg_SF_FSE_FS  1,2      3              2             NULL         1.41               1.28               NULL
Country_2  Site_3  Mach_3    ProtocolC   Ger_SE_FSE_FS  1        3              NULL          NULL         0.83               NULL               NULL

Answer 1

Window 函数是聚合的有效方法： Over Clause

使用 OVER 子句，您可以定义自己的聚合函数。

如果失败，你可以用 CTE 破解它 Concatenation with CTEs

Answer 2

你能试试这个吗？

    SELECT 
    CS.Id As ID,
    CP.Country As Country,
    S.Title As Site,
    CONCAT(V.Title,' ',M.Model,' ',M.Version) As Machine,
    CP.Title As Protocol,
    CS.Title As Sequence,
 --   IQS.SequenceType AS Type,
    STUFF(OQS.types,1,1,'') AS [type],
  --  IQS.ImageQuality AS IQ,
    _IQBeforeOpt =MAX(
        CASE IQS.SequenceType
            WHEN 1 THEN IQS.ImageQuality
        END),
    _IQDuringOpt =MAX( 
        CASE IQS.SequenceType
            WHEN 2 THEN IQS.ImageQuality
        END),
    _IQAfterOpt = 
        MAX(CASE IQS.SequenceType
            WHEN 3 THEN IQS.ImageQuality
        END),
 --  ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY))) AS SeqPI,
   _SeqPIBeforeOpt = MAX(
        CASE IQS.SequenceType
            WHEN 1 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
       END),
  _SeqPIDuringOpt =MAX(
      CASE IQS.SequenceType
          WHEN 2 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
      END),
  _SeqPIAfterOpt =MAX(
      CASE IQS.SequenceType
          WHEN 3 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
      END)       
FROM ClientSequence CS
JOIN ImageQualitySequencePool IQS ON CS.Id = IQS.SequenceId
JOIN ClientProtocol CP ON CS.ClientProtocolId = CP.Id
JOIN Team S ON CP.TeamID = S.Id
JOIN Machine M On CP.MachineId = M.Id
JOIN Vendor V ON M.VendorId = V.Id
OUTER APPLY(SELECT ','+LTRIM(QS.SequenceType) FROM ImageQualitySequencePool AS QS WHERE CS.Id = QS.SequenceId FOR XML PATH('')) OQS(types)
GROUP BY CS.Id, CP.Country, S.Title ,CONCAT(V.Title,' ',M.Model,' ',M.Version),CP.MachineId,CP.Title,CS.Title,oQS.types
ORDER BY CP.Country,S.Title,CP.MachineId,CP.Title,CS.Title--,IQS.SequenceType

Answer 3

试试这个查询：

SELECT
    CP.Country As Country,
    S.Title As Site,
    CONCAT(V.Title,' ',M.Model,' ',M.Version) As Machine,
    CP.Title As Protocol,
    CS.Title As Sequence,
    STUFF(CONCAT(MAX(IIF(IQS.SequenceType = 1, ',1', '')), MAX(IIF(IQS.SequenceType = 2, ',2', '')), MAX(IIF(IQS.SequenceType = 3, ',3', ''))),1,1,'') AS Type,
    _IQBeforeOpt =
        MAX(CASE IQS.SequenceType
            WHEN 1 THEN IQS.ImageQuality
        END),
    _IQDuringOpt = 
        MAX(CASE IQS.SequenceType
            WHEN 2 THEN IQS.ImageQuality
        END),
    _IQAfterOpt = 
        MAX(CASE IQS.SequenceType
            WHEN 3 THEN IQS.ImageQuality
        END),
   _SeqPIBeforeOpt = 
        MAX(CASE IQS.SequenceType
            WHEN 1 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
       END),
  _SeqPIDuringOpt =
      MAX(CASE IQS.SequenceType
          WHEN 2 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
      END),
  _SeqPIAfterOpt =
      MAX(CASE IQS.SequenceType
          WHEN 3 THEN ((IQS.ImageQuality*IQS.SeqSlices)/(IQS.SeqTime*(CS.slicetkndef*CS.pixelspacingX*CS.pixelspacingY)))
      END)      
FROM 
    ClientSequence CS
    JOIN ImageQualitySequencePool IQS ON CS.Id = IQS.SequenceId
    JOIN ClientProtocol CP ON CS.ClientProtocolId = CP.Id
    JOIN Team S ON CP.TeamID = S.Id
    JOIN Machine M On CP.MachineId = M.Id
    JOIN Vendor V ON M.VendorId = V.Id
GROUP BY CP.Country, S.Title, CONCAT(V.Title,' ',M.Model,' ',M.Version), CP.Title, CS.Title

Combined SQL select 数据集多行根据列值合并成一行

Combine SQL select data-set multiple rows into a single row based on column values

sql

database

sql-server

relational-database